[R-pkg-devel] OpenMP variable not specified in enclosing 'parallel'

On Mon, 23 Mar 2020 15:29:20 +0100

const int iMaxLag = 20;

error: ?iMaxLag? not specified in enclosing ?parallel?

error: ?iMaxLag? is predetermined ?shared? for ?shared?

This looks like a compiler bug to me. g++ seems to forget the rule that
"const" variables are supposed to be shared despite the default(none)
clause.

In a similar situation (g++ being confused about the sharing
status of a hidden temporary variable it had internally created) I had
to remove default(none) and leave a comment explaining that the code
would not compile otherwise.

Best regards,
Ivan